Mug



FIG. 1 is a front view in perspective of a mug according to the present design;

FIG. 2 is a side view in perspective thereof;

FIG. 3 is a back view in perspective thereof;

FIG. 4 is a second side view in perspective thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a mug, as shown and described. 